CN2505642Y - Automatic adjusting arm for vehicle brake gap - Google Patents
Automatic adjusting arm for vehicle brake gap Download PDFInfo
- Publication number
- CN2505642Y CN2505642Y CN 01272488 CN01272488U CN2505642Y CN 2505642 Y CN2505642 Y CN 2505642Y CN 01272488 CN01272488 CN 01272488 CN 01272488 U CN01272488 U CN 01272488U CN 2505642 Y CN2505642 Y CN 2505642Y
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- CN
- China
- Prior art keywords
- arm
- worm
- gear
- adjusting
- driving gear
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an automatic adjusting arm for vehicle brake gap, wherein, a connecting hole for pneumatic pushing bar is arranged on one end of the automatic adjusting arm while a camshaft is fixed with the other end; a drive worm wheel is fixed on the camshaft and a worm meshing with the worm wheel is arranged on the camshaft; a worm shaft is supportingly arranged on the sidewall of the adjusting arm; the adjusting arm is provided with an automatic adjusting device which adopts a drive structure of gear wheel and rack; the gear wheel is arranged on a same shaft with the worm; an unidirectional clutch is arranged between the gear wheel and the worm; a deflector rod is fixed at the bottom of the rack; the outer end of the deflector rod is inserted into the groove of a fixed block; and the fixed block is fixed with a machine frame. The utility model has the advantages of capacity of automatically keeping the vehicle brake gap constant, simple structure, reliable operation, adoption of totally enclosed form, and capacity of adapting to various severe environments.
Description
Technical field:
The utility model relates to braking device.More particularly, be a kind of braking device that is applied on the automobile.
Technical background:
Automobile often needs frequently to use break in the process of moving, and the brake shoe on the break increases gradually because of the gap between wearing and tearing and the brake drum.Thereby cause braking retardation, sideslip, poor stop, brake (front, rear, left and right break) etc. not simultaneously.Bring potential safety hazard to driving, even cause major traffic accidents.Therefore, in time adjust the position of brake shoe, make the normal clearance between its maintenance and the brake drum.At present, generally the artificial adjustment arm of Shi Yonging is that Worm and worm-wheel gearing is set in brake arm, and wherein, worm gear connects firmly by spline and camshaft.Rely on artificial rotary worm axle, make shoe plate near brake drum by Worm and worm-wheel gearing.The concrete problem that exists is, because braking is frequent, wearing and tearing also are gradually, can't reach accurately and timely manually.Moreover, manual operation is wasted time and energy.
In the patent No. is in the utility model patent of ZL972145966, discloses a kind of adjustment arm that can be used for adjusting automatically brake clearance.But owing in its concrete structure, adopted the spring clutch, thereby bring following problem:
1, because all multifactor influences such as spring is subjected to material, heat treatment, is heated, endures cold, resiliently deformables, the angular flexibility that is produced when making skidding increases greatly, and functional reliability is subjected to great influence.
2, owing in the long-term work process, be in often in the rugged environment, antirust, the dustproof problem of adjusting interior each member of arm can not be well solved, especially spring clutch, because entering of water or dust caused corrosion, stuck, had a strong impact on functional reliability.
3, the gap of Zeng Daing can not well be kept after obtaining adjustment, has often increased the wearing and tearing of clutch, has reduced the longevity of product and has used mission.
4, the requirement of clutch spring accuracy of manufacturing is quite high, and manufacture cost is increased greatly.
Summary of the invention:
Technical problem to be solved in the utility model provides a kind of arm for adjusting automobile brake clearance automatically of simple in structure, reliable operation.
The technological scheme that the utility model technical solution problem is adopted is: have the air-leg attachment hole at an end of adjusting arm, the other end connects firmly camshaft, on described camshaft, is fixedly connected with the transmission worm gear, and there are the worm screw that is meshed with described transmission worm gear, worm shaft to be bearing on the adjustment arm sidewall.
Structural feature of the present utility model is that automatic adjusting mechanism is set, this mechanism adopts gear, the tooth bar drive mechanism that is made of driving gear and driving rack, described driving gear and the coaxial setting of worm screw, between driving gear and worm screw, be provided with overrunning clutch, bottom at described driving rack is fixedly connected with driving lever, the driving lever outer end is inserted in the fixed block groove, and fixed block and frame connect firmly.
The utility model utilizes overrunning clutch by adopting rack and pinion drive mechanism, and in braking process, the distance that driving rack moved promptly is the measurement to the gap increase; In the return process, oppositely move through driving gear and the clutch of tooth bar drive worm screw, make camshaft turn over corresponding angle thereby drive worm gear, eliminate the gap that is increased, and realize the automatic adjustment of brake clearance.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
1, the utility model can keep brake clearance constant automatically, each wheel braking effect unanimity, thereby brake is safe and reliable rapidly.
2, use the utility model can reduce compressed-air actuated loss, prolong the working life of braking system.
3, the utility model can adopt totally enclosed structural type, adapts to various rugged environment, and reliable performance can significantly reduce maintenance frequency, reduces upkeep cost, thereby increases economic efficiency.
The drawing explanation:
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model gear rack drive mechanism schematic representation.
Embodiment:
Referring to Fig. 1, Fig. 2, have air-leg attachment hole 2 at an end of adjusting arm 1, the other end connects firmly camshaft 3, on camshaft 3, be fixedly connected with transmission worm gear 4 by spline, and have the worm screw 5 that is meshed with described transmission worm gear 4, worm shaft 6 to be bearing on the adjustment arm sidewall.
Shown in the figure, in the present embodiment, automatic adjusting mechanism is set, this mechanism adopts the gear rack drive mechanism that is made of driving gear 7 and driving rack 8.Wherein driving gear 7 and worm screw 5 coaxial settings are provided with overrunning clutch 9 between driving gear 7 and worm screw 5.Simultaneously, be fixedly connected with driving lever 10 in the bottom of driving rack 8, the outer end of driving lever 10 is inserted in the fixed block groove 11, and fixed block 12 connects firmly with frame.
In concrete the enforcement, driving gear 7 and clutch 9 all slide on the worm shaft 6, and clutch 9 forms the zigzag fashion one-way clutch with the end face of one side end face and driving gear 7, and opposite side end face and worm shaft 6 form stationary fit, adopt the engagement of awl tooth in the present embodiment.In order to make transmission accurately and reliably, be respectively arranged with stage clip at the two ends of worm shaft 6, comprise the awl spring 13 that slides on the worm shaft 6, between driving gear 7 and adjustment arm sidewall; Be arranged on the dish spring 14 between worm shaft end face and the adjustment arm sidewall.Wherein, awl spring 13 plays the effect that buffering is replied, the setting of dish spring 14 be for make the gap be adjusted into normal after, be maintained effectively.
In concrete the enforcement, shown in Figure 1, be inserted in the driving lever 10 in the fixed block groove 11, in groove 11, have along the activity allowance on tooth bar 8 glide directions.This activity allowance is to be provided with for the brake shoe on the break and the normal clearance between the brake drum.Shown in Figure 2, in order to guarantee accurately to reset, be provided with reset spring 15 in the lower end of tooth bar.In addition, for waterproof and dustproof, avoid corrosion, guarantee functional reliability, reduce rate of fault, increase the service life, each member all seals and is arranged in the housing of adjusting arm 1.
In the braking process, promoted to adjust arm 1 by the brake chamber push rod, make it drive camshaft 3 and rotate, meanwhile, each member of adjusting in the arm 1 rotates with it.The rotation of camshaft 3 makes brake shoe rely on brake drum by the brake cam that connects firmly thereon, realizes braking.After removing thrust, adjust arm 1 reverse rotation return, braking is removed.
In the time of in brake clearance is in normal range (NR), because the existence of " driving lever activity allowance " in the fixed block groove 11, in braking and the return process, adjusting arm 1 rotates, driving rack 8 is not moved in its slideway, only with driving lever 10 slide relative in the fixed block groove 11 with " activity allowance " of its bottom.Thereby, keep static relatively between the meshed gears tooth bar.Brake shoe and brake drum keep its normal gap.
After brake clearance increases because of wearing and tearing, in the braking process, adjust the corresponding increase of angle that arm 1 is rotated, because the driving lever 10 of driving rack bottom is limited in the fixed block groove 11, therefore, tooth bar 8 produces slip in its slideway, and gear 7 carried out transmission, but because the setting of overrunning clutch 9, this moment cltuch slipping, it is static that worm shaft 6 still keeps, and finishes normal brake application.In this braking process, the distance that tooth bar 8 moves past is the measurement to the gap increase.In the return process, driving gear 7 and the clutch 9 that oppositely move through of tooth bar 8 drives worm screws 5, makes camshaft turn over corresponding angle thereby drive worm gear 4, eliminates the gap that is increased, and realizes the automatic adjustment of brake clearance.14 pairs of formed pressure of worm shaft of dish spring are kept adjusted brake clearance.
Claims (5)
1, arm for adjusting automobile brake clearance automatically, has air-leg attachment hole (2) at an end of adjusting arm (1), the other end connects firmly camshaft (3), on described camshaft (3), be fixedly connected with transmission worm gear (4), and the worm screw (5) that is meshed with described transmission worm gear (4) arranged, worm shaft (6) is bearing on the sidewall of adjusting arm (1), it is characterized in that being provided with automatic adjusting mechanism, this mechanism adopts the gear that is made of driving gear (7) and driving gear (8), the tooth bar drive mechanism, described driving gear (7) and the coaxial setting of worm screw (5), between driving gear (7) and worm screw (5), be provided with overrunning clutch (9), be fixedly connected with driving lever (10) in the bottom of described driving rack (8), driving lever (10) outer end is inserted in the fixed block groove (11), and fixed block (12) connects firmly with frame.
2, arm for adjusting automobile brake clearance automatically according to claim 1 is characterized in that the described driving lever (10) that is inserted in the fixed block groove (11) has along the activity allowance on tooth bar (8) glide direction in groove (11).
3, arm for adjusting automobile brake clearance automatically according to claim 1, it is characterized in that described driving gear (7) and overrunning clutch (9) all slide on the worm shaft (6), overrunning clutch (9) forms the zigzag fashion one-way clutch with the end face of one side end face and driving gear (7), and opposite side end face and worm shaft (6) form stationary fit.
4, arm for adjusting automobile brake clearance automatically according to claim 3 is characterized in that at worm shaft (6) end face and adjusts between arm (1) sidewall being provided with dish spring (14).
5,, it is characterized in that described each member all seals in the housing that is arranged on adjustment arm (1) according to claim 1 or 2 or 3 or 4 described arm for adjusting automobile brake clearance automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01272488 CN2505642Y (en) | 2001-11-26 | 2001-11-26 | Automatic adjusting arm for vehicle brake gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01272488 CN2505642Y (en) | 2001-11-26 | 2001-11-26 | Automatic adjusting arm for vehicle brake gap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2505642Y true CN2505642Y (en) | 2002-08-14 |
Family
ID=33677632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01272488 Expired - Fee Related CN2505642Y (en) | 2001-11-26 | 2001-11-26 | Automatic adjusting arm for vehicle brake gap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2505642Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836230A (en) * | 2019-12-10 | 2020-02-25 | 广州市润浩汽车配件有限公司 | Novel worm shaft assembly for automatic adjusting arm |
-
2001
- 2001-11-26 CN CN 01272488 patent/CN2505642Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836230A (en) * | 2019-12-10 | 2020-02-25 | 广州市润浩汽车配件有限公司 | Novel worm shaft assembly for automatic adjusting arm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |